I wasn't quite sure this was the correct topic tag.

I'm working on a project that involves a large sensor
array spread over a couple acres. I think the longest
run so far is about 2500 meters (~8000 feet) with a
sensor every 75 meters (~200 foot).  All the sensors
are monitored by a master PC.  So the cables have to
be waterproof etc and neither cause or be affected by
RF.  Right now the big problem seems to be the layout
without resorting to Cat-F.  Probably need a few hubs
buried out there to make it work. Any good reference
stuff to look at this type of extended net setup?

I've been looking at building the interface using
either a RTL8019AS or CS8900-IQ. Are there any others
I should look at?

The actual sensors are pretty simple and a 12C509A
was selected and easily more than handles (on the bench)
what it has to do.  I think the 509's will have to be replaced with
something with a bit more power and pins such as a 870/877
before it would handle both its sensors and the ethernet overhead.
Are there any better suited pics?

Dave

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